`timescale 1ns / 1ps

`define RST        1'b1

`define ZERO_WORD  64'h00000000_00000000
`define PC_START   64'h00000000_80000000     
`define REG_BUS    63 : 0
`define D_BUS      63 : 0     
`define I_BUS      63 : 0 
`define RAM_BUS      63 : 0

`define REG_ADDR_0 5'b00000   

`define RISCV_PRIV_MODE_U   0
`define RISCV_PRIV_MODE_S   1
`define RISCV_PRIV_MODE_M   3



